For the Inventor, By the Inventor

Enter assignee name

Elkem-spigerverket A/s

USPTO Granted Patents = 31

Forward Citations = 181

Loading Chart...

Loading Chart...

29 inventors (with patents filed for the assignee):

Harald Krogsrud (6 out of 18 patents)

Egil Hyggen (3 out of 3 patents)

Ole A Kongsgaarden (2 out of 3 patents)

4. Birger Leif Ydstie (2 out of 2 patents)

5. Norvald Gjelsvik (2 out of 5 patents)

6. Ingleif Hundere (2 out of 2 patents)

7. Frank Muus (1 out of 3 patents)

8. Einar Onarheim (1 out of 1 patent)

9. Arne Georg Arnesen (1 out of 1 patent)

10. Jan Schokkenbroek (1 out of 1 patent)

11. Knut Waldeman Jahnsen (1 out of 1 patent)

12. Thor Pedersen (1 out of 2 patents)

13. Erik Qvale Dahl (1 out of 1 patent)

14. Knut Waldemar Jahnsen (1 out of 1 patent)

15. Halldor Opedal (1 out of 1 patent)

31 patents: Sort by Forward Citations

1. 4384465 - Lock mechanism (1983-05-24),

2. D267306 - Spade (1982-12-21),

3. 4297327 - Method of precipitation of pure aluminiumchloride from solutions which (1981-10-27),

4. 4297326 - Method of producing a pure aluminiumoxide from solutions containing (1981-10-27),

5. 4254298 - Direct current smelting furnace (1981-03-03),

6. 4247306 - Detection of flaws in metal members (1981-01-27),

7. 4245133 - Roof for covered electric smelting furnaces (1981-01-13),

8. 4238634 - Gas tight seal for electrodes in smelting furnaces (1980-12-09),

9. 4196602 - Locking latch handle for windows, doors, and the like (1980-04-08),

10. 4168093 - Vehicle trailer construction (1979-09-18),

11. 4166192 - Matte smelting (1979-08-28),

12. 4162284 - Method of producing mechanically strong pellets from non-oxidizable (1979-07-24),

13. 4161501 - Method of producing mechanically strong metal oxide pellets (1979-07-17),

14. 4147500 - System for continuous analysis of gasses (1979-04-03),

15. 4141945 - Method of disposing of precipitated silica (1979-02-27),

Elkem-Spigerverket A/S is a leading global supplier of advanced silicon, silicones, ferrosilicon alloys, special alloys, carbon materials, and microsilica. With expertise across a wide range of industries, we deliver innovative solutions that contribute to sustainable development. Through our commitment to research and development, we strive to create products that meet the needs of our customers while minimizing environmental impact. Visit our website to learn more about our offerings and how we can help you.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

31 Patents

#22 in Oslo

#55 in Norway

#20,605 in the World

Elkem-spigerverket A/s

Forward Citations = 181

29 inventors:

Harald Krogsrud (6 out of 18 patents)

Egil Hyggen (3 out of 3 patents)

Ole A Kongsgaarden (2 out of 3 patents)

4. Birger Leif Ydstie (2 out of 2 patents)

5. Norvald Gjelsvik (2 out of 5 patents)

Please report any incorrect information to support@idiyas.com

Loading…